70072147 has 4 divisors (see below), whose sum is σ = 74194056. Its totient is φ = 65950240.

The previous prime is 70072111. The next prime is 70072193. The reversal of 70072147 is 74127007.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 74127007 = 937 ⋅79111.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-70072147 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (70972147) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2060929 + ... + 2060962.

It is an arithmetic number, because the mean of its divisors is an integer number (18548514).

Almost surely, 2^70072147 is an apocalyptic number.

70072147 is a deficient number, since it is larger than the sum of its proper divisors (4121909).

70072147 is a wasteful number, since it uses less digits than its factorization.

70072147 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4121908.

The product of its (nonzero) digits is 2744, while the sum is 28.

The square root of 70072147 is about 8370.9107628740. The cubic root of 70072147 is about 412.2700710648.

The spelling of 70072147 in words is "seventy million, seventy-two thousand, one hundred forty-seven".